string.cpp

#include <iostream>
#include <cstring>
#include "string.h"

class String;

String::String()
{
    len = 0;
    str = new char[1];
    str[0] = '\0';
}
String::String(const char* s)
{
    len = strlen(s);
    str = new char[len + 1];
    strcpy(str, s);
}
String::String(const String& other)
{
    len = other.len;
    str = new char[len + 1];
    strcpy(str, other.str);
}

String& String::operator=(const String& other)
{
    if (this == &other)
        return *this;

    delete[] str;
    len = other.len;
    str = new char[len + 1];
    strcpy(str, other.str);
    return *this;
}

WordIterator String::split(const String& separators)
{
    WordIterator result;
    char* p = this->str;
    while(p)
    {
        p = skip_spaces(p, separators);
        if (!*p)
            break;

        char* word = p;
        p = skip_until_spaces(p, separators);
        int  len = p-word;
        char* wordcc = new char[len+1];
        strncpy(wordcc, word, len);
        wordcc[len] = 0;
        result.add(wordcc);
        delete[] wordcc;
    }
    return result;
}
void WordIterator::checkReferences()
{
    (*refCount)--;
    if ((*refCount) == 0)
    {
        while (start)
        {
            ListItem* tmp = start->next;
            delete start;
            start = tmp;
        }
        delete refCount;
    }
}
void WordIterator::copyReferences(const WordIterator& other)
{
    this->words = other.words;
    this->start = other.start;
    this->count = other.count;
    this->current = other.current;
    this->refCount = other.refCount;
    (*refCount)++;
}

WordIterator& WordIterator::operator=(const WordIterator& other)
{
    checkReferences();
    copyReferences(other);
    return *this;
}